Answer: I've never heard of the first story and you didn't provide the author so I couldn't find it. However, the narrator of "The Tell-Tale Heart" is very paranoid and frightened, but also impulsive throughout the story. It creates a fearful and tense mood to the story that may not have been there if it was narrated by a more confident person.
Answer: Being a teacher is a very big job and it can be very difficult if done alone. So when parents, families and caregivers volunteer, they're making the job easier and also more efficient thereby making themselves a resource to the teacher.
